Accession Number:

AD1004746

Title:

A Framework for Quantifying and Reducing Uncertainty in InfoSymbiotic Systems Arising in Atmospheric Environments

Descriptive Note:

Technical Report,01 Aug 2012,30 Sep 2015

Corporate Author:

Virginia Polytechnic Institute and State University Blacksburg United States

Personal Author(s):

Report Date:

2016-02-29

Pagination or Media Count:

20.0

Abstract:

This project focuses on large scale dynamic data driven applications systems DDDAS, or InfoSymbiotic systems governed by partial differential equations PDEs, e.g., arising in atmospheric environments. Specifically, our main interests are data assimilation and the configuration of sensor networks. During this project we have developed a rigorous framework for quantifying and reducing uncertainty in the context of InfoSymbiotic systems. This includes a goal-oriented aposteriori error estimation methodology for the impact of different errors on the variational solutions of inverse problems an optimization-constrained optimization problem approach to find the optimal configuration of the DDDAS system new parallel-in-time algorithms to speed up variational inference a trust-region approach to perform inference in an ensemble space new nonlinear filtering and smoothing algorithms that sample directly from the posterior PDF using a Hybrid Markov-Chain Monte CarloHMCMC approach and a solid theoretical basis for optimization with reduced order models.

Subject Categories:

  • Information Science
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE